Dario Franchitti has been discharged from hospital after undergoing ankle surgery to treat injuries sustained in a horrifying crash at the Houston Grand Prix in Texas.

The three-time Indy500 champion suffered a concussion, a fractured spine and a fractured right ankle after colliding with fellow competitor Takuma Sato and slamming into a fence on Oct. 6.

He was released from Memorial-Hermann Texas Medical Center in Houston on Oct. 10, but was back under doctors' care in Indianapolis on Monday, when surgeons performed a three-hour procedure on his right ankle to repair the talus bone.

He was released from hospital on Thursday, when he was photographed leaving the facility in a wheelchair, and will now continue his recovery process at home.

However, Franchitti is already eyeing a return to the track. Sources tell TMZ.com the driver is aiming to get "back on the racetrack" in time for the start of next season, which begins in the spring.